arm64: dts: imx8mm: Correct WDOG_B pin configuration

Different revision of i.MX8MM EVK boards may have different external pull up registor design, some are enabled while some are NOT, to make sure the WDOG_B pin works properly, better to enable internal pull up resistor. Since enabling internal pull up resistor is NOT harmful and having benefit of flexibility on different board design, just enable it for all i.MX8MM boards; And schmitt input is NOT necessary for this WDOG_B output pin, so remove it; Open drain outputs provide more flexibility to a designer as they can be pulled-up to any voltage found in the system, so enable it as well. Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Freescale · Oct 30, 2020 · b781820 · b781820
1 parent 582b6d8
commit b781820
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diff --git a/arch/arm64/boot/dts/freescale/imx8mm-beacon-som.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-beacon-som.dtsi
@@ -437,7 +437,7 @@
 
 		pinctrl_wdog: wdoggrp {
 			fsl,pins = <
-				MX8MM_IOMUXC_GPIO1_IO02_WDOG1_WDOG_B		0xc6
+				MX8MM_IOMUXC_GPIO1_IO02_WDOG1_WDOG_B		0x166
 			>;
 		};
 

diff --git a/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi
@@ -468,7 +468,7 @@
 
 	pinctrl_wdog: wdoggrp {
 		fsl,pins = <
-			MX8MM_IOMUXC_GPIO1_IO02_WDOG1_WDOG_B	0xc6
+			MX8MM_IOMUXC_GPIO1_IO02_WDOG1_WDOG_B	0x166
 		>;
 	};
 };
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-var-som.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-var-som.dtsi
@@ -555,7 +555,7 @@
 
 	pinctrl_wdog: wdoggrp {
 		fsl,pins = <
-			MX8MM_IOMUXC_GPIO1_IO02_WDOG1_WDOG_B	0xc6
+			MX8MM_IOMUXC_GPIO1_IO02_WDOG1_WDOG_B	0x166
 		>;
 	};
 };